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Showing 1–24 of 828 matching trials from the live ClinicalTrials.gov search.
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Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

Exploratory Trial to Evaluate the Safety and Immunogenicity of Menactra® and Menomune® Vaccines in Subjects ≥ 56 Years

NCT00874549
View directory record Official record
Conditions
Meningococcal Infections, Meningococcal Meningitis
Interventions
Menomune®: A, C, Y, W-135 Meningococcal Polysaccharide, Menactra®: Polysaccharide Diphtheria Toxoid Conjugate
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
56 Years and older
Enrollment
216 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2008
U.S. locations
6
States / cities
Scottsdale, Arizona • Bardstown, Kentucky • Albuquerque, New Mexico + 3 more
Source: ClinicalTrials.gov public record
Updated Sep 19, 2013 · Synced Sep 25, 2026, 1:37 PM EDT
Withdrawn Phase 1 Interventional Accepts healthy volunteers

IM Recombinant Ricin Toxin Vaccine (RVEc) - 3-Dose Primary Series With Boost

NCT02385825
View directory record Official record
Conditions
Ricin Poisoning
Interventions
RVEc
Biological
Lead sponsor
U.S. Army Medical Research and Development Command
Federal
Eligibility
18 Years to 50 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
Fort Deterick, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 1, 2020 · Synced Sep 25, 2026, 1:37 PM EDT
Active, not recruiting Phase 2 Interventional

High vs. Standard Dose Influenza Vaccine in Adult SOT Recipients

NCT04613206
View directory record Official record
Conditions
Immunization; Infection, Transplantation Infection, Influenza, Solid Organ Transplant
Interventions
High Dose Quadrivalent Inactivated Influenza Vaccine, Standard Dose Quadrivalent Inactivated Influenza Vaccine
Biological
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
396 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jan 20, 2026 · Synced Sep 25, 2026, 1:37 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Randomized Single-Blinded Study to Evaluate Safety and Immunogenicity of Recombinant Plague Vaccine With and Without Adjuvant

NCT01122784
View directory record Official record
Conditions
Plague Vaccine
Interventions
rF1V vaccine (with Adjuvant), rF1V vaccine (without Adjuvant)
Biological
Lead sponsor
DynPort Vaccine Company LLC, A GDIT Company
Industry
Eligibility
18 Years to 55 Years
Enrollment
402 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2012
U.S. locations
11
States / cities
San Francisco, California • Santa Ana, California • Lenexa, Kansas + 8 more
Source: ClinicalTrials.gov public record
Updated Jul 29, 2020 · Synced Sep 25, 2026, 1:37 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Safety Study of Group A, C, Y & W-135 Meningococcal Polysaccharide Diphtheria Toxoid Conjugate Vaccine for Meningitis

NCT01482052
View directory record Official record
Conditions
Meningococcal Meningitis, Meningococcal Infections
Interventions
meningococcal meningitis conjugate vaccine, quadrivalent
Biological
Lead sponsor
JN-International Medical Corporation
Industry
Eligibility
18 Years to 50 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2013
U.S. locations
1
States / cities
Hanford, California
Source: ClinicalTrials.gov public record
Updated Jan 13, 2013 · Synced Sep 25, 2026, 1:37 PM EDT
Terminated Phase 2 Interventional

Phase II Study of Treatment for HPV16+ ASC-US, ASC-H and LSIL

NCT03911076
View directory record Official record
Conditions
ASC-US, ASC-H, LSIL
Interventions
PVX-2, Placebo
Biological · Other
Lead sponsor
PapiVax Biotech, Inc.
Other
Eligibility
25 Years to 70 Years · Female only
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
6
States / cities
Port Saint Lucie, Florida • Newark, New Jersey • Fairfield, Ohio + 3 more
Source: ClinicalTrials.gov public record
Updated Jun 16, 2024 · Synced Sep 25, 2026, 1:37 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Trivalent rHA Dose Escalation Study in Elderly Subjects

NCT00170443
View directory record Official record
Conditions
Influenza
Interventions
rHAO Trivalent Influenza Vaccine
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
65 Years to 80 Years
Enrollment
399 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Ends 2004
U.S. locations
3
States / cities
Rochester, New York • Cincinnati, Ohio • Houston, Texas
Source: ClinicalTrials.gov public record
Updated Aug 11, 2011 · Synced Sep 25, 2026, 1:37 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

A Study to Evaluate the Immunogenicity and Safety of bioCSL Quadrivalent Influenza Vaccine (QIV) in Adults Aged 18 Years and Above.

NCT02214225
View directory record Official record
Conditions
Influenza, Human
Interventions
Quadrivalent Influenza Vaccine (QIV), Trivalent Influenza Vaccine (TIV-1), Trivalent Influenza Vaccine (TIV-2)
Biological
Lead sponsor
Seqirus
Industry
Eligibility
18 Years and older
Enrollment
3,484 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
33
States / cities
Huntsville, Alabama • Los Angeles, California • San Diego, California + 29 more
Source: ClinicalTrials.gov public record
Updated Mar 12, 2017 · Synced Sep 25, 2026, 1:37 PM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

A Study to Evaluate the Safety, Tolerability, and Immunogenicity of a Modified RNA Vaccine Against Influenza

NCT05052697
View directory record Official record
Conditions
Influenza, Human
Interventions
mIRV, bIRV AB, qIRV, QIV, bIRV AA, bIRV BB
Biological
Lead sponsor
Pfizer
Industry
Eligibility
18 Years to 85 Years
Enrollment
1,158 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
100
States / cities
Athens, Alabama • Phoenix, Arizona • Tucson, Arizona + 58 more
Source: ClinicalTrials.gov public record
Updated Mar 11, 2024 · Synced Sep 25, 2026, 1:37 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Immunogenicity and Safety of an Investigational Quadrivalent Meningococcal Conjugate Vaccine in Healthy Adolescents

NCT02199691
View directory record Official record
Conditions
Meningitis, Meningococcal Meningitis, Meningococcal Infections
Interventions
Meningococcal Polysaccharide (Serogroups A, C, Y, and W135) Tetanus Toxoid Conjugate Vaccine, Meningococcal (Groups A, C, Y and W135) Oligosaccharide Diphtheria CRM197 Conjugate Vaccine, Adacel®: Tetanus Toxoid, Reduced Diphtheria Toxoid and Acellular Pertussis Vaccine Adsorbed, GARDASIL®: Human Papillomavirus Quadrivalent (Types 6, 11, 16, and 18) Vaccine, Recombinant
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
10 Years to 17 Years
Enrollment
1,715 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
35
States / cities
Birmingham, Alabama • Huntsville, Alabama • Downey, California + 28 more
Source: ClinicalTrials.gov public record
Updated Apr 3, 2022 · Synced Sep 25, 2026, 1:37 PM EDT
Completed Phase 2 Interventional

Safety, Tolerability and Abeta-specific Antibody Response of Repeated i.m. Injections of Adjuvanted CAD106 in Mild Alzheimer Patients

NCT01097096
View directory record Official record
Conditions
Alzheimer's Disease
Interventions
CAD106, Placebo, Alum, MF59
Biological
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
Up to 85 Years
Enrollment
177 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
5
States / cities
Costa Mesa, California • Boulder, Colorado • Hollywood, Florida + 2 more
Source: ClinicalTrials.gov public record
Updated Mar 4, 2021 · Synced Sep 25, 2026, 1:37 PM EDT
Completed Phase 1Phase 2 Interventional

Lomecel-B on Vaccine-Specific Antibody- Response in Subjects With Aging Frailty

NCT02982915
View directory record Official record
Conditions
Aging Frailty
Interventions
Longeveron Mesenchymal Stem Cells (LMSCs), Fluzone High Dose Vaccine
Biological
Lead sponsor
Longeveron Inc.
Industry
Eligibility
65 Years to 90 Years
Enrollment
62 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2022
U.S. locations
6
States / cities
Coral Gables, Florida • Fort Myers, Florida • Miami, Florida + 2 more
Source: ClinicalTrials.gov public record
Updated Nov 3, 2022 · Synced Sep 25, 2026, 1:37 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Assessment of the Immunogenicity and Safety of a Dose-Sparing BioThrax® AVA Schedule

NCT01641991
View directory record Official record
Conditions
Bacillus Anthracis (Anthrax)
Interventions
BioThrax®
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 65 Years
Enrollment
328 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
4
States / cities
Atlanta, Georgia • Cincinnati, Ohio • Houston, Texas + 1 more
Source: ClinicalTrials.gov public record
Updated May 27, 2014 · Synced Sep 25, 2026, 1:37 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Double Blind, Safety and Immunogenicity Study of Recombinant Botulinum Vaccine A/B

NCT00764634
View directory record Official record
Conditions
Botulism Vaccine
Interventions
Placebo (USP sterile saline for injection), rBV A/B-40 vaccine
Biological
Lead sponsor
DynPort Vaccine Company LLC, A GDIT Company
Industry
Eligibility
18 Years to 55 Years
Enrollment
440 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2010
U.S. locations
6
States / cities
Miami, Florida • Pembroke Pines, Florida • Lenexa, Kansas + 3 more
Source: ClinicalTrials.gov public record
Updated Dec 1, 2011 · Synced Sep 25, 2026, 1:37 PM EDT
Active, not recruiting Phase 3 Interventional Accepts healthy volunteers

Study of the Safety and Immunogenicity of Catch-up Vaccination With a 21-valent Pneumococcal Conjugate Vaccine (PCV21) in Healthy Infants, Toddlers, Children, and Adolescents

NCT06838000
View directory record Official record
Conditions
Pneumococcal Infections
Interventions
PCV21, 20vPCV
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
7 Months to 17 Years
Enrollment
1,268 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
17
States / cities
Paramount, California • Doral, Florida • Hialeah, Florida + 13 more
Source: ClinicalTrials.gov public record
Updated Oct 5, 2025 · Synced Sep 25, 2026, 1:37 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

AMA1-C1/Alhydrogel + CpG 7909 for Malaria

NCT00344539
View directory record Official record
Conditions
Plasmodium Falciparum Malaria
Interventions
AMA1-C1/Alhydrogel®, CPG 7909 Oligodeoxynucleotide (VaxImmune®)
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 45 Years
Enrollment
75 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2007
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Jun 2, 2013 · Synced Sep 25, 2026, 1:37 PM EDT
Completed No phase listed Observational Accepts healthy volunteers Results available

Persistence of Bactericidal Antibodies in Adolescents and Adults Who Had Received a Single Dose of Menactra® Vaccine

NCT00862277
View directory record Official record
Conditions
Meningococcal Infections, Meningitis
Interventions
Menactra®, Menomune®
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
14 Years to 27 Years
Enrollment
763 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2009
U.S. locations
20
States / cities
Little Rock, Arkansas • Fountain Valley, California • Marietta, Georgia + 15 more
Source: ClinicalTrials.gov public record
Updated Apr 13, 2016 · Synced Sep 25, 2026, 1:37 PM EDT
Completed Not applicable Interventional Results available

Open-Label Influenza Vaccine Evaluation

NCT02872311
View directory record Official record
Conditions
Immune Response
Interventions
High Dose Influenza vaccine, Adjuvanted Influenza vaccine, Standard Dose Influenza vaccine, Recombinant Influenza vaccine
Biological
Lead sponsor
Marshfield Clinic Research Foundation
Other
Eligibility
65 Years to 74 Years
Enrollment
179 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
Marshfield, Wisconsin
Source: ClinicalTrials.gov public record
Updated Dec 9, 2025 · Synced Sep 25, 2026, 1:37 PM EDT
Terminated Phase 3 Interventional Accepts healthy volunteers Results available

Study on a High-Dose Quadrivalent Influenza Vaccine Compared With Standard-Dose Quadrivalent Influenza Vaccine in Children 6 Months Through 35 Months of Age

NCT04544267
View directory record Official record
Conditions
Influenza
Interventions
Quadrivalent influenza vaccine, high-dose, Quadrivalent influenza vaccine, standard dose
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
6 Months to 35 Months
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
10
States / cities
San Diego, California • Miami, Florida • Atlanta, Georgia + 6 more
Source: ClinicalTrials.gov public record
Updated Dec 23, 2025 · Synced Sep 25, 2026, 1:37 PM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers

A Study of mRNA-1647 Cytomegalovirus Vaccine in Healthy Participants 9 to 15 Years of Age and Participants 16 to 25 Years of Age

NCT05575492
View directory record Official record
Conditions
Cytomegalovirus
Interventions
mRNA-1647, Placebo
Biological · Other
Lead sponsor
ModernaTX, Inc.
Industry
Eligibility
9 Years to 25 Years
Enrollment
873 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
44
States / cities
La Mesa, California • Sacramento, California • Fort Collins, Colorado + 38 more
Source: ClinicalTrials.gov public record
Updated Jun 3, 2026 · Synced Sep 25, 2026, 1:37 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Safety of and Immune Response to Two HIV Vaccine Formulations (rMVA-HIV and rFPV-HIV) Alone or in Combination in HIV Uninfected Adults

NCT00083603
View directory record Official record
Conditions
HIV Infections
Interventions
rMVA-HIV (rMVA-HIV env/gag + rMVA-HIV tat/rev/nef-RT), rFPV-HIV (rFPV-HIV env/gag + rFPV-HIV tat/rev/nef-RT), Empty TBC-FPV, TBC-MVA and TBC-FPV
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 50 Years
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2007
U.S. locations
4
States / cities
Birmingham, Alabama • St Louis, Missouri • Rochester, New York + 1 more
Source: ClinicalTrials.gov public record
Updated Oct 13, 2021 · Synced Sep 25, 2026, 1:37 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Immune Response Following Seasonal Influenza Vaccination

NCT03163342
View directory record Official record
Conditions
Influenza
Interventions
Licensed seasonal influenza vaccine
Biological
Lead sponsor
Altimmune, Inc.
Industry
Eligibility
18 Years to 50 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Rockville, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 25, 2019 · Synced Sep 25, 2026, 1:37 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

A Study to Evaluate the Safety, Tolerability, and Immunogenicity of V114 When Administered Concomitantly With Influenza Vaccine in Healthy Adults 50 Years of Age or Older (V114-021/PNEU-FLU)

NCT03615482
View directory record Official record
Conditions
Pneumococcal Infections
Interventions
V114, QIV, Matching Placebo for V114
Biological
Lead sponsor
Merck Sharp & Dohme LLC
Industry
Eligibility
50 Years and older
Enrollment
1,200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
45
States / cities
Birmingham, Alabama • Chandler, Arizona • Mesa, Arizona + 39 more
Source: ClinicalTrials.gov public record
Updated May 21, 2024 · Synced Sep 25, 2026, 1:37 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Safety and Immunogenicity of a Novel H5N1 Influenza Vaccine in Healthy Adults Age 18-49 Years

NCT01560793
View directory record Official record
Conditions
Influenza
Interventions
VAX161 [STF2.HA5 H5N1]
Biological
Lead sponsor
VaxInnate Corporation
Industry
Eligibility
18 Years to 49 Years
Enrollment
224 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
2
States / cities
Miami, Florida • Lenexa, Kansas
Source: ClinicalTrials.gov public record
Updated Sep 22, 2014 · Synced Sep 25, 2026, 1:37 PM EDT